With the return of catcher Yasmani Grandal, the next major roster decision facing the Padres is which outfielder is moved when center fielder Cameron Maybin comes off the disabled list.

Maybin is out of options, so he must be returned to the 25-man roster no later than June 14 unless he reinjures his right wrist while on his rehab assignment with Triple-A Tucson.

When Maybin returns, the most likely candidates to go to Triple-A Tucson are corner outfielder-first basemen Jesus Guzman and Kyle Blanks. Both have an option remaining.

Guzman, 28, is the Padres primary right-handed pinch-hitter. Going into Wednesday night’s start against Seattle, Guzman was 0-for-15 since hitting the first grand slam of his career as a pinch-hitter in Tampa Bay on May 11.

Blanks, 26, who started Wednesday night’s game in right field, was hitting .273 with three homers and 12 RBIs in 77 at-bats since being promoted from Tucson April 14 when Carlos Quentin started serving his eight-game suspension.

Blanks will likely see a reduction in playing time when Maybin returns. Quentin will be starting as often as possible in left with Chris Denorfia and Will Venable platooning in right.

The other outfield reserves are veteran Mark Kotsay (also the club’s primary left-handed pinch-hitter) and Alexi Amarista, who is also the Padres lone reserve infielder.

Given that Blanks missed almost all of two of the last three seasons due to injury, the Padres would prefer to see him get at-bats every day at Tucson rather than be a reserve on the major league bench. However, Guzman could also use a steady diet of at-bats to get back on track.

“I’d be lying if I said the possibility of going back to Tucson wasn’t a reality,” Blanks said Wednesday. “But that’s something I have no control over. I am very pleased with my quality of play right now. I think I’ve made a great step in the right direction. I’m healthy and been able to stay consistent.”

Maybin is 5-for-11 with a double and a walk in four starts with Tucson.

Grandal faces media

Wednesday was Yasmani Grandal’s first game at Petco Park since he completed his 50-game suspension for violating Major League Baseball’s policy prohibiting performance-enhancing drugs.

He was the subject of a pregame press conference in the Padres dugout.

Grandal said he was glad his first game back was in Seattle. “I would have been a lot more nervous in San Diego,” he said.

Grandal reiterated that the Padres come first in his responsibilities but threw out an olive branch to Padres fans.

“I do apologize to them in some kind of way,” he said. “To the fans, thank you for your support. But the Padres come first. I’m excited for tonight’s game. I’m happy to be back in San Diego.”

Grandal was asked if he was concerned about how his performance would be viewed after playing at least part of last season with above normal levels of testosterone?

“The way I see it,” said Grandal, “if I do good, I did it. If not, sophomore slump.”

--Padres right-hander Edinson Volquez had been bothered by a blister when throwing breaking pitches in several recent outings. The healing of the blister allowed Volquez to throw more curves Tuesday night when he held Seattle to one run on four hits over 7 2/3 innings. Volquez also had blister problems in 2012.

--Right-hander Burch Smith allowed one run on six hits and no walks over five innings in his debut with Triple-A Tucson Tuesday night.